Optimal pH and Stability Guidelines for Spirulina Extract (Phycocyanin) Blue Color

Spirulina Extract Phycocyanin Blue Color is a natural pigment-protein complex. Because it is a protein-based colorant, its stability is highly sensitive to environmental factors such as pH, temperature, and light.

Optimal pH for Stability

The color of Phycocyanin is most stable within a pH range of 5.0 to 7.5.

• Maximum Stability: The peak stability is typically found around pH 6.0.
• Acidic Conditions: At a pH below 4.0, the protein structure tends to denature and aggregate, leading to precipitation and a significant loss of the vibrant blue color.
• Alkaline Conditions: At a pH above 8.0, the pigment can also become unstable and fade.

Measures to Improve Stability

To maintain the intensity and longevity of the blue color in your formulation, consider the following measures:

1. Maintain Optimal pH: Use a buffering agent to keep the formulation's pH between 5.5 and 6.5.
2. Avoid High Temperatures: Phycocyanin is heat-sensitive. It is recommended to add the extract during the "cool-down" phase of production (below 40°C). Avoid processes that require prolonged heating.
3. Light Protection: This natural colorant is sensitive to UV light. Use opaque or UV-protected packaging to prevent fading over time.
4. Use of Stabilizers: Adding polyols (such as Glycerin or Sorbitol) or certain sugars can help stabilize the protein structure of the phycocyanin, making it more resistant to environmental stress.
5. Storage: Store the raw material and the finished product in a cool, dark place, away from direct sunlight and heat sources.

For cosmetic applications, you can use Spirulina Extract Phycocyanin Blue Color (Natural Colorant), and for food applications, Spirulina Extract Phycocyanin Blue Color (Natural Food Colorant) is available.